1.\" 2.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.Dd February 15, 2018 27.Dt PMAP_QENTER 9 28.Os 29.Sh NAME 30.Nm pmap_qenter , 31.Nm pmap_qremove 32.Nd manage temporary kernel space mappings 33.Sh SYNOPSIS 34.In sys/param.h 35.In vm/vm.h 36.In vm/pmap.h 37.Ft void 38.Fn pmap_qenter "vm_offset_t sva" "vm_page_t *m" "int count" 39.Ft void 40.Fn pmap_qremove "vm_offset_t sva" "int count" 41.Sh DESCRIPTION 42The 43.Fn pmap_qenter 44function accepts a linear array of 45.Fa count 46pointers to wired pages 47.Fa *m , 48and enters each of these pages into the kernel virtual address (KVA) space, 49beginning at the address 50.Fa sva . 51The pages are mapped non-executable, if possible. 52(For example, non-PAE i386 has no capability to map pages non-executable.) 53.Pp 54The 55.Fn pmap_qremove 56function tears out a mapping from the kernel virtual address space, 57beginning at 58.Fa sva 59and for 60.Fa count 61pages. 62.Sh IMPLEMENTATION NOTES 63The 64.Fn pmap_qenter 65function is intended for temporary mappings that do not require page 66modification or reference counting. 67Old mappings are simply overwritten. 68The pages 69.Em must 70be wired into physical memory. 71.Pp 72The corresponding 73.Fn pmap_qremove 74function is intended to remove such temporary mappings. 75.Sh SEE ALSO 76.Xr pmap 9 77.Sh AUTHORS 78This manual page was written by 79.An Bruce M Simpson Aq Mt bms@spc.org . 80